96 PHYSICAL SCIENCES IN ANCIENT GREECE. 



period of the intellectual activity of the Greeks. 

 But I will give a brief account of some of the other 

 Sciences before I proceed to Astronomy, for two 

 reasons ; first, because the origin of Astronomy is 

 lost in the obscurity of a remote antiquity; and 

 therefore we cannot exemplify the conditions of the 

 first rise of science so well in that subject as we can 

 in others which assumed their scientific form at 

 known periods ; and next, in order that I may not 

 have to interrupt, after I have once begun it, the 

 history of the only progressive Science which the 

 ancient world produced (E). 



